Home / 21,391.57-29,518.72-11,958.85

Finding the Fourth Proportional to 21,391.57, 29,518.72 and 11,958.85

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Solution

The fourth proportional to 21,391.57, 29,518.72 and 11,958.85 is: 16,502.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,391.57 : 29,518.72 = 11,958.85 : x
  2. Step 2: Convert to fraction form
    21,391.57/29,518.72 = 11,958.85/x
  3. Step 3: Cross multiply
    21,391.57x = 29,518.72 × 11,958.85
  4. Step 4: Simplify right side
    21,391.57x = 353,009,944.67
  5. Step 5: Solve for x
    x = 353,009,944.67/21,391.57
  6. Step 6: Final answer
    x = 16,502.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.